[mirror_ubuntu-bionic-kernel.git] / include / linux / sunrpc / gss_krb5.h

/*
 *  linux/include/linux/sunrpc/gss_krb5_types.h
 *
 *  Adapted from MIT Kerberos 5-1.2.1 lib/include/krb5.h,
 *  lib/gssapi/krb5/gssapiP_krb5.h, and others
 *
 *  Copyright (c) 2000-2008 The Regents of the University of Michigan.
 *  All rights reserved.
 *
 *  Andy Adamson   <andros@umich.edu>
 *  Bruce Fields   <bfields@umich.edu>
 */

/*
 * Copyright 1995 by the Massachusetts Institute of Technology.
 * All Rights Reserved.
 *
 * Export of this software from the United States of America may
 *   require a specific license from the United States Government.
 *   It is the responsibility of any person or organization contemplating
 *   export to obtain such a license before exporting.
 *
 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
 * distribute this software and its documentation for any purpose and
 * without fee is hereby granted, provided that the above copyright
 * notice appear in all copies and that both that copyright notice and
 * this permission notice appear in supporting documentation, and that
 * the name of M.I.T. not be used in advertising or publicity pertaining
 * to distribution of the software without specific, written prior
 * permission.  Furthermore if you modify this software you must label
 * your software as modified software and not distribute it in such a
 * fashion that it might be confused with the original M.I.T. software.
 * M.I.T. makes no representations about the suitability of
 * this software for any purpose.  It is provided "as is" without express
 * or implied warranty.
 *
 */

#include <crypto/skcipher.h>
#include <linux/sunrpc/auth_gss.h>
#include <linux/sunrpc/gss_err.h>
#include <linux/sunrpc/gss_asn1.h>

/* Length of constant used in key derivation */
#define GSS_KRB5_K5CLENGTH (5)

/* Maximum key length (in bytes) for the supported crypto algorithms*/
#define GSS_KRB5_MAX_KEYLEN (32)

/* Maximum checksum function output for the supported crypto algorithms */
#define GSS_KRB5_MAX_CKSUM_LEN  (20)

/* Maximum blocksize for the supported crypto algorithms */
#define GSS_KRB5_MAX_BLOCKSIZE  (16)

struct krb5_ctx;

struct gss_krb5_enctype {
	const u32		etype;		/* encryption (key) type */
	const u32		ctype;		/* checksum type */
	const char		*name;		/* "friendly" name */
	const char		*encrypt_name;	/* crypto encrypt name */
	const char		*cksum_name;	/* crypto checksum name */
	const u16		signalg;	/* signing algorithm */
	const u16		sealalg;	/* sealing algorithm */
	const u32		blocksize;	/* encryption blocksize */
	const u32		conflen;	/* confounder length
						   (normally the same as
						   the blocksize) */
	const u32		cksumlength;	/* checksum length */
	const u32		keyed_cksum;	/* is it a keyed cksum? */
	const u32		keybytes;	/* raw key len, in bytes */
	const u32		keylength;	/* final key len, in bytes */
	u32 (*encrypt) (struct crypto_skcipher *tfm,
			void *iv, void *in, void *out,
			int length);		/* encryption function */
	u32 (*decrypt) (struct crypto_skcipher *tfm,
			void *iv, void *in, void *out,
			int length);		/* decryption function */
	u32 (*mk_key) (const struct gss_krb5_enctype *gk5e,
		       struct xdr_netobj *in,
		       struct xdr_netobj *out);	/* complete key generation */
	u32 (*encrypt_v2) (struct krb5_ctx *kctx, u32 offset,
			   struct xdr_buf *buf,
			   struct page **pages); /* v2 encryption function */
	u32 (*decrypt_v2) (struct krb5_ctx *kctx, u32 offset,
			   struct xdr_buf *buf, u32 *headskip,
			   u32 *tailskip);	/* v2 decryption function */
};

/* krb5_ctx flags definitions */
#define KRB5_CTX_FLAG_INITIATOR         0x00000001
#define KRB5_CTX_FLAG_CFX               0x00000002
#define KRB5_CTX_FLAG_ACCEPTOR_SUBKEY   0x00000004

struct krb5_ctx {
	int			initiate; /* 1 = initiating, 0 = accepting */
	u32			enctype;
	u32			flags;
	const struct gss_krb5_enctype *gk5e; /* enctype-specific info */
	struct crypto_skcipher	*enc;
	struct crypto_skcipher	*seq;
	struct crypto_skcipher *acceptor_enc;
	struct crypto_skcipher *initiator_enc;
	struct crypto_skcipher *acceptor_enc_aux;
	struct crypto_skcipher *initiator_enc_aux;
	u8			Ksess[GSS_KRB5_MAX_KEYLEN]; /* session key */
	u8			cksum[GSS_KRB5_MAX_KEYLEN];
	s32			endtime;
	u32			seq_send;
	u64			seq_send64;
	struct xdr_netobj	mech_used;
	u8			initiator_sign[GSS_KRB5_MAX_KEYLEN];
	u8			acceptor_sign[GSS_KRB5_MAX_KEYLEN];
	u8			initiator_seal[GSS_KRB5_MAX_KEYLEN];
	u8			acceptor_seal[GSS_KRB5_MAX_KEYLEN];
	u8			initiator_integ[GSS_KRB5_MAX_KEYLEN];
	u8			acceptor_integ[GSS_KRB5_MAX_KEYLEN];
};

extern spinlock_t krb5_seq_lock;

/* The length of the Kerberos GSS token header */
#define GSS_KRB5_TOK_HDR_LEN	(16)

#define KG_TOK_MIC_MSG    0x0101
#define KG_TOK_WRAP_MSG   0x0201

#define KG2_TOK_INITIAL     0x0101
#define KG2_TOK_RESPONSE    0x0202
#define KG2_TOK_MIC         0x0404
#define KG2_TOK_WRAP        0x0504

#define KG2_TOKEN_FLAG_SENTBYACCEPTOR   0x01
#define KG2_TOKEN_FLAG_SEALED           0x02
#define KG2_TOKEN_FLAG_ACCEPTORSUBKEY   0x04

#define KG2_RESP_FLAG_ERROR             0x0001
#define KG2_RESP_FLAG_DELEG_OK          0x0002

enum sgn_alg {
	SGN_ALG_DES_MAC_MD5 = 0x0000,
	SGN_ALG_MD2_5 = 0x0001,
	SGN_ALG_DES_MAC = 0x0002,
	SGN_ALG_3 = 0x0003,		/* not published */
	SGN_ALG_HMAC_MD5 = 0x0011,	/* microsoft w2k; no support */
	SGN_ALG_HMAC_SHA1_DES3_KD = 0x0004
};
enum seal_alg {
	SEAL_ALG_NONE = 0xffff,
	SEAL_ALG_DES = 0x0000,
	SEAL_ALG_1 = 0x0001,		/* not published */
	SEAL_ALG_MICROSOFT_RC4 = 0x0010,/* microsoft w2k; no support */
	SEAL_ALG_DES3KD = 0x0002
};

#define CKSUMTYPE_CRC32			0x0001
#define CKSUMTYPE_RSA_MD4		0x0002
#define CKSUMTYPE_RSA_MD4_DES		0x0003
#define CKSUMTYPE_DESCBC		0x0004
#define CKSUMTYPE_RSA_MD5		0x0007
#define CKSUMTYPE_RSA_MD5_DES		0x0008
#define CKSUMTYPE_NIST_SHA		0x0009
#define CKSUMTYPE_HMAC_SHA1_DES3	0x000c
#define CKSUMTYPE_HMAC_SHA1_96_AES128   0x000f
#define CKSUMTYPE_HMAC_SHA1_96_AES256   0x0010
#define CKSUMTYPE_HMAC_MD5_ARCFOUR      -138 /* Microsoft md5 hmac cksumtype */

/* from gssapi_err_krb5.h */
#define KG_CCACHE_NOMATCH                        (39756032L)
#define KG_KEYTAB_NOMATCH                        (39756033L)
#define KG_TGT_MISSING                           (39756034L)
#define KG_NO_SUBKEY                             (39756035L)
#define KG_CONTEXT_ESTABLISHED                   (39756036L)
#define KG_BAD_SIGN_TYPE                         (39756037L)
#define KG_BAD_LENGTH                            (39756038L)
#define KG_CTX_INCOMPLETE                        (39756039L)
#define KG_CONTEXT                               (39756040L)
#define KG_CRED                                  (39756041L)
#define KG_ENC_DESC                              (39756042L)
#define KG_BAD_SEQ                               (39756043L)
#define KG_EMPTY_CCACHE                          (39756044L)
#define KG_NO_CTYPES                             (39756045L)

/* per Kerberos v5 protocol spec crypto types from the wire. 
 * these get mapped to linux kernel crypto routines.  
 */
#define ENCTYPE_NULL            0x0000
#define ENCTYPE_DES_CBC_CRC     0x0001	/* DES cbc mode with CRC-32 */
#define ENCTYPE_DES_CBC_MD4     0x0002	/* DES cbc mode with RSA-MD4 */
#define ENCTYPE_DES_CBC_MD5     0x0003	/* DES cbc mode with RSA-MD5 */
#define ENCTYPE_DES_CBC_RAW     0x0004	/* DES cbc mode raw */
/* XXX deprecated? */
#define ENCTYPE_DES3_CBC_SHA    0x0005	/* DES-3 cbc mode with NIST-SHA */
#define ENCTYPE_DES3_CBC_RAW    0x0006	/* DES-3 cbc mode raw */
#define ENCTYPE_DES_HMAC_SHA1   0x0008
#define ENCTYPE_DES3_CBC_SHA1   0x0010
#define ENCTYPE_AES128_CTS_HMAC_SHA1_96 0x0011
#define ENCTYPE_AES256_CTS_HMAC_SHA1_96 0x0012
#define ENCTYPE_ARCFOUR_HMAC            0x0017
#define ENCTYPE_ARCFOUR_HMAC_EXP        0x0018
#define ENCTYPE_UNKNOWN         0x01ff

/*
 * Constants used for key derivation
 */
/* for 3DES */
#define KG_USAGE_SEAL (22)
#define KG_USAGE_SIGN (23)
#define KG_USAGE_SEQ  (24)

/* from rfc3961 */
#define KEY_USAGE_SEED_CHECKSUM         (0x99)
#define KEY_USAGE_SEED_ENCRYPTION       (0xAA)
#define KEY_USAGE_SEED_INTEGRITY        (0x55)

/* from rfc4121 */
#define KG_USAGE_ACCEPTOR_SEAL  (22)
#define KG_USAGE_ACCEPTOR_SIGN  (23)
#define KG_USAGE_INITIATOR_SEAL (24)
#define KG_USAGE_INITIATOR_SIGN (25)

/*
 * This compile-time check verifies that we will not exceed the
 * slack space allotted by the client and server auth_gss code
 * before they call gss_wrap().
 */
#define GSS_KRB5_MAX_SLACK_NEEDED \
	(GSS_KRB5_TOK_HDR_LEN     /* gss token header */         \
	+ GSS_KRB5_MAX_CKSUM_LEN  /* gss token checksum */       \
	+ GSS_KRB5_MAX_BLOCKSIZE  /* confounder */               \
	+ GSS_KRB5_MAX_BLOCKSIZE  /* possible padding */         \
	+ GSS_KRB5_TOK_HDR_LEN    /* encrypted hdr in v2 token */\
	+ GSS_KRB5_MAX_CKSUM_LEN  /* encryption hmac */          \
	+ 4 + 4                   /* RPC verifier */             \
	+ GSS_KRB5_TOK_HDR_LEN                                   \
	+ GSS_KRB5_MAX_CKSUM_LEN)

u32
make_checksum(struct krb5_ctx *kctx, char *header, int hdrlen,
		struct xdr_buf *body, int body_offset, u8 *cksumkey,
		unsigned int usage, struct xdr_netobj *cksumout);

u32
make_checksum_v2(struct krb5_ctx *, char *header, int hdrlen,
		 struct xdr_buf *body, int body_offset, u8 *key,
		 unsigned int usage, struct xdr_netobj *cksum);

u32 gss_get_mic_kerberos(struct gss_ctx *, struct xdr_buf *,
		struct xdr_netobj *);

u32 gss_verify_mic_kerberos(struct gss_ctx *, struct xdr_buf *,
		struct xdr_netobj *);

u32
gss_wrap_kerberos(struct gss_ctx *ctx_id, int offset,
		struct xdr_buf *outbuf, struct page **pages);

u32
gss_unwrap_kerberos(struct gss_ctx *ctx_id, int offset,
		struct xdr_buf *buf);


u32
krb5_encrypt(struct crypto_skcipher *key,
	     void *iv, void *in, void *out, int length);

u32
krb5_decrypt(struct crypto_skcipher *key,
	     void *iv, void *in, void *out, int length); 

int
gss_encrypt_xdr_buf(struct crypto_skcipher *tfm, struct xdr_buf *outbuf,
		    int offset, struct page **pages);

int
gss_decrypt_xdr_buf(struct crypto_skcipher *tfm, struct xdr_buf *inbuf,
		    int offset);

s32
krb5_make_seq_num(struct krb5_ctx *kctx,
		struct crypto_skcipher *key,
		int direction,
		u32 seqnum, unsigned char *cksum, unsigned char *buf);

s32
krb5_get_seq_num(struct krb5_ctx *kctx,
	       unsigned char *cksum,
	       unsigned char *buf, int *direction, u32 *seqnum);

int
xdr_extend_head(struct xdr_buf *buf, unsigned int base, unsigned int shiftlen);

u32
krb5_derive_key(const struct gss_krb5_enctype *gk5e,
		const struct xdr_netobj *inkey,
		struct xdr_netobj *outkey,
		const struct xdr_netobj *in_constant,
		gfp_t gfp_mask);

u32
gss_krb5_des3_make_key(const struct gss_krb5_enctype *gk5e,
		       struct xdr_netobj *randombits,
		       struct xdr_netobj *key);

u32
gss_krb5_aes_make_key(const struct gss_krb5_enctype *gk5e,
		      struct xdr_netobj *randombits,
		      struct xdr_netobj *key);

u32
gss_krb5_aes_encrypt(struct krb5_ctx *kctx, u32 offset,
		     struct xdr_buf *buf,
		     struct page **pages);

u32
gss_krb5_aes_decrypt(struct krb5_ctx *kctx, u32 offset,
		     struct xdr_buf *buf, u32 *plainoffset,
		     u32 *plainlen);

int
krb5_rc4_setup_seq_key(struct krb5_ctx *kctx,
		       struct crypto_skcipher *cipher,
		       unsigned char *cksum);

int
krb5_rc4_setup_enc_key(struct krb5_ctx *kctx,
		       struct crypto_skcipher *cipher,
		       s32 seqnum);
void
gss_krb5_make_confounder(char *p, u32 conflen);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/include/linux/sunrpc/gss_krb5_types.h
	3	*
	4	* Adapted from MIT Kerberos 5-1.2.1 lib/include/krb5.h,
	5	* lib/gssapi/krb5/gssapiP_krb5.h, and others
	6	*
81d4a433	7	* Copyright (c) 2000-2008 The Regents of the University of Michigan.
1da177e4 LT	8	* All rights reserved.
	9	*
	10	* Andy Adamson <andros@umich.edu>
	11	* Bruce Fields <bfields@umich.edu>
	12	*/
	13
	14	/*
	15	* Copyright 1995 by the Massachusetts Institute of Technology.
	16	* All Rights Reserved.
	17	*
	18	* Export of this software from the United States of America may
	19	* require a specific license from the United States Government.
	20	* It is the responsibility of any person or organization contemplating
	21	* export to obtain such a license before exporting.
	22	*
	23	* WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
	24	* distribute this software and its documentation for any purpose and
	25	* without fee is hereby granted, provided that the above copyright
	26	* notice appear in all copies and that both that copyright notice and
	27	* this permission notice appear in supporting documentation, and that
	28	* the name of M.I.T. not be used in advertising or publicity pertaining
	29	* to distribution of the software without specific, written prior
	30	* permission. Furthermore if you modify this software you must label
	31	* your software as modified software and not distribute it in such a
	32	* fashion that it might be confused with the original M.I.T. software.
	33	* M.I.T. makes no representations about the suitability of
	34	* this software for any purpose. It is provided "as is" without express
	35	* or implied warranty.
	36	*
	37	*/
	38
3b5cf20c	39	#include <crypto/skcipher.h>
1da177e4 LT	40	#include <linux/sunrpc/auth_gss.h>
	41	#include <linux/sunrpc/gss_err.h>
	42	#include <linux/sunrpc/gss_asn1.h>
	43
4891f2d0 KC	44	/* Length of constant used in key derivation */
	45	#define GSS_KRB5_K5CLENGTH (5)
	46
e1f6c07b KC	47	/* Maximum key length (in bytes) for the supported crypto algorithms*/
	48	#define GSS_KRB5_MAX_KEYLEN (32)
	49
725f2865 KC	50	/* Maximum checksum function output for the supported crypto algorithms */
	51	#define GSS_KRB5_MAX_CKSUM_LEN (20)
	52
	53	/* Maximum blocksize for the supported crypto algorithms */
	54	#define GSS_KRB5_MAX_BLOCKSIZE (16)
	55
de9c17eb KC	56	struct krb5_ctx;
de9c17eb KC	57
81d4a433 KC	58	struct gss_krb5_enctype {
	59	const u32 etype; /* encryption (key) type */
	60	const u32 ctype; /* checksum type */
	61	const char name; / "friendly" name */
	62	const char encrypt_name; / crypto encrypt name */
	63	const char cksum_name; / crypto checksum name */
	64	const u16 signalg; /* signing algorithm */
	65	const u16 sealalg; /* sealing algorithm */
	66	const u32 blocksize; /* encryption blocksize */
5af46547 KC	67	const u32 conflen; /* confounder length
	68	(normally the same as
	69	the blocksize) */
81d4a433 KC	70	const u32 cksumlength; /* checksum length */
	71	const u32 keyed_cksum; /* is it a keyed cksum? */
	72	const u32 keybytes; /* raw key len, in bytes */
	73	const u32 keylength; /* final key len, in bytes */
3b5cf20c	74	u32 (encrypt) (struct crypto_skcipher tfm,
81d4a433 KC	75	void iv, void in, void *out,
81d4a433 KC	76	int length); /* encryption function */
3b5cf20c	77	u32 (decrypt) (struct crypto_skcipher tfm,
81d4a433 KC	78	void iv, void in, void *out,
81d4a433 KC	79	int length); /* decryption function */
47d84807	80	u32 (mk_key) (const struct gss_krb5_enctype gk5e,
4891f2d0 KC	81	struct xdr_netobj *in,
4891f2d0 KC	82	struct xdr_netobj out); / complete key generation */
de9c17eb	83	u32 (encrypt_v2) (struct krb5_ctx kctx, u32 offset,
ec25422c	84	struct xdr_buf *buf,
de9c17eb KC	85	struct page *pages); / v2 encryption function */
	86	u32 (decrypt_v2) (struct krb5_ctx kctx, u32 offset,
	87	struct xdr_buf buf, u32 headskip,
	88	u32 tailskip); / v2 decryption function */
81d4a433 KC	89	};
81d4a433 KC	90
47d84807 KC	91	/* krb5_ctx flags definitions */
	92	#define KRB5_CTX_FLAG_INITIATOR 0x00000001
	93	#define KRB5_CTX_FLAG_CFX 0x00000002
	94	#define KRB5_CTX_FLAG_ACCEPTOR_SUBKEY 0x00000004
	95
1da177e4 LT	96	struct krb5_ctx {
1da177e4 LT	97	int initiate; /* 1 = initiating, 0 = accepting */
1ac3719a	98	u32 enctype;
47d84807	99	u32 flags;
81d4a433	100	const struct gss_krb5_enctype gk5e; / enctype-specific info */
3b5cf20c HX	101	struct crypto_skcipher *enc;
	102	struct crypto_skcipher *seq;
	103	struct crypto_skcipher *acceptor_enc;
	104	struct crypto_skcipher *initiator_enc;
	105	struct crypto_skcipher *acceptor_enc_aux;
	106	struct crypto_skcipher *initiator_enc_aux;
fc263a91	107	u8 Ksess[GSS_KRB5_MAX_KEYLEN]; /* session key */
e1f6c07b	108	u8 cksum[GSS_KRB5_MAX_KEYLEN];
1da177e4 LT	109	s32 endtime;
1da177e4 LT	110	u32 seq_send;
47d84807	111	u64 seq_send64;
1da177e4	112	struct xdr_netobj mech_used;
47d84807 KC	113	u8 initiator_sign[GSS_KRB5_MAX_KEYLEN];
	114	u8 acceptor_sign[GSS_KRB5_MAX_KEYLEN];
	115	u8 initiator_seal[GSS_KRB5_MAX_KEYLEN];
	116	u8 acceptor_seal[GSS_KRB5_MAX_KEYLEN];
	117	u8 initiator_integ[GSS_KRB5_MAX_KEYLEN];
	118	u8 acceptor_integ[GSS_KRB5_MAX_KEYLEN];
1da177e4 LT	119	};
1da177e4 LT	120
eaa82edf BF	121	extern spinlock_t krb5_seq_lock;
eaa82edf BF	122
d00953a5 KC	123	/* The length of the Kerberos GSS token header */
	124	#define GSS_KRB5_TOK_HDR_LEN (16)
	125
1da177e4 LT	126	#define KG_TOK_MIC_MSG 0x0101
	127	#define KG_TOK_WRAP_MSG 0x0201
	128
de9c17eb KC	129	#define KG2_TOK_INITIAL 0x0101
	130	#define KG2_TOK_RESPONSE 0x0202
	131	#define KG2_TOK_MIC 0x0404
	132	#define KG2_TOK_WRAP 0x0504
	133
	134	#define KG2_TOKEN_FLAG_SENTBYACCEPTOR 0x01
	135	#define KG2_TOKEN_FLAG_SEALED 0x02
	136	#define KG2_TOKEN_FLAG_ACCEPTORSUBKEY 0x04
	137
	138	#define KG2_RESP_FLAG_ERROR 0x0001
	139	#define KG2_RESP_FLAG_DELEG_OK 0x0002
	140
1da177e4 LT	141	enum sgn_alg {
	142	SGN_ALG_DES_MAC_MD5 = 0x0000,
	143	SGN_ALG_MD2_5 = 0x0001,
	144	SGN_ALG_DES_MAC = 0x0002,
	145	SGN_ALG_3 = 0x0003, /* not published */
	146	SGN_ALG_HMAC_MD5 = 0x0011, /* microsoft w2k; no support */
	147	SGN_ALG_HMAC_SHA1_DES3_KD = 0x0004
	148	};
	149	enum seal_alg {
	150	SEAL_ALG_NONE = 0xffff,
	151	SEAL_ALG_DES = 0x0000,
	152	SEAL_ALG_1 = 0x0001, /* not published */
	153	SEAL_ALG_MICROSOFT_RC4 = 0x0010,/* microsoft w2k; no support */
	154	SEAL_ALG_DES3KD = 0x0002
	155	};
	156
1da177e4 LT	157	#define CKSUMTYPE_CRC32 0x0001
	158	#define CKSUMTYPE_RSA_MD4 0x0002
	159	#define CKSUMTYPE_RSA_MD4_DES 0x0003
	160	#define CKSUMTYPE_DESCBC 0x0004
	161	#define CKSUMTYPE_RSA_MD5 0x0007
	162	#define CKSUMTYPE_RSA_MD5_DES 0x0008
	163	#define CKSUMTYPE_NIST_SHA 0x0009
	164	#define CKSUMTYPE_HMAC_SHA1_DES3 0x000c
de9c17eb KC	165	#define CKSUMTYPE_HMAC_SHA1_96_AES128 0x000f
	166	#define CKSUMTYPE_HMAC_SHA1_96_AES256 0x0010
	167	#define CKSUMTYPE_HMAC_MD5_ARCFOUR -138 /* Microsoft md5 hmac cksumtype */
1da177e4 LT	168
	169	/* from gssapi_err_krb5.h */
	170	#define KG_CCACHE_NOMATCH (39756032L)
	171	#define KG_KEYTAB_NOMATCH (39756033L)
	172	#define KG_TGT_MISSING (39756034L)
	173	#define KG_NO_SUBKEY (39756035L)
	174	#define KG_CONTEXT_ESTABLISHED (39756036L)
	175	#define KG_BAD_SIGN_TYPE (39756037L)
	176	#define KG_BAD_LENGTH (39756038L)
	177	#define KG_CTX_INCOMPLETE (39756039L)
	178	#define KG_CONTEXT (39756040L)
	179	#define KG_CRED (39756041L)
	180	#define KG_ENC_DESC (39756042L)
	181	#define KG_BAD_SEQ (39756043L)
	182	#define KG_EMPTY_CCACHE (39756044L)
	183	#define KG_NO_CTYPES (39756045L)
	184
	185	/* per Kerberos v5 protocol spec crypto types from the wire.
	186	* these get mapped to linux kernel crypto routines.
	187	*/
	188	#define ENCTYPE_NULL 0x0000
	189	#define ENCTYPE_DES_CBC_CRC 0x0001 /* DES cbc mode with CRC-32 */
	190	#define ENCTYPE_DES_CBC_MD4 0x0002 /* DES cbc mode with RSA-MD4 */
	191	#define ENCTYPE_DES_CBC_MD5 0x0003 /* DES cbc mode with RSA-MD5 */
	192	#define ENCTYPE_DES_CBC_RAW 0x0004 /* DES cbc mode raw */
	193	/* XXX deprecated? */
	194	#define ENCTYPE_DES3_CBC_SHA 0x0005 /* DES-3 cbc mode with NIST-SHA */
	195	#define ENCTYPE_DES3_CBC_RAW 0x0006 /* DES-3 cbc mode raw */
	196	#define ENCTYPE_DES_HMAC_SHA1 0x0008
	197	#define ENCTYPE_DES3_CBC_SHA1 0x0010
47d84807 KC	198	#define ENCTYPE_AES128_CTS_HMAC_SHA1_96 0x0011
	199	#define ENCTYPE_AES256_CTS_HMAC_SHA1_96 0x0012
	200	#define ENCTYPE_ARCFOUR_HMAC 0x0017
	201	#define ENCTYPE_ARCFOUR_HMAC_EXP 0x0018
1da177e4 LT	202	#define ENCTYPE_UNKNOWN 0x01ff
1da177e4 LT	203
4891f2d0 KC	204	/*
	205	* Constants used for key derivation
	206	*/
	207	/* for 3DES */
	208	#define KG_USAGE_SEAL (22)
	209	#define KG_USAGE_SIGN (23)
	210	#define KG_USAGE_SEQ (24)
	211
	212	/* from rfc3961 */
	213	#define KEY_USAGE_SEED_CHECKSUM (0x99)
	214	#define KEY_USAGE_SEED_ENCRYPTION (0xAA)
	215	#define KEY_USAGE_SEED_INTEGRITY (0x55)
	216
	217	/* from rfc4121 */
	218	#define KG_USAGE_ACCEPTOR_SEAL (22)
	219	#define KG_USAGE_ACCEPTOR_SIGN (23)
	220	#define KG_USAGE_INITIATOR_SEAL (24)
	221	#define KG_USAGE_INITIATOR_SIGN (25)
	222
725f2865 KC	223	/*
	224	* This compile-time check verifies that we will not exceed the
	225	* slack space allotted by the client and server auth_gss code
	226	* before they call gss_wrap().
	227	*/
	228	#define GSS_KRB5_MAX_SLACK_NEEDED \
	229	(GSS_KRB5_TOK_HDR_LEN /* gss token header */ \
	230	+ GSS_KRB5_MAX_CKSUM_LEN /* gss token checksum */ \
	231	+ GSS_KRB5_MAX_BLOCKSIZE /* confounder */ \
	232	+ GSS_KRB5_MAX_BLOCKSIZE /* possible padding */ \
	233	+ GSS_KRB5_TOK_HDR_LEN /* encrypted hdr in v2 token */\
	234	+ GSS_KRB5_MAX_CKSUM_LEN /* encryption hmac */ \
	235	+ 4 + 4 /* RPC verifier */ \
	236	+ GSS_KRB5_TOK_HDR_LEN \
	237	+ GSS_KRB5_MAX_CKSUM_LEN)
	238
e1f6c07b KC	239	u32
	240	make_checksum(struct krb5_ctx kctx, char header, int hdrlen,
	241	struct xdr_buf body, int body_offset, u8 cksumkey,
8b237076	242	unsigned int usage, struct xdr_netobj *cksumout);
1da177e4	243
de9c17eb KC	244	u32
	245	make_checksum_v2(struct krb5_ctx , char header, int hdrlen,
	246	struct xdr_buf body, int body_offset, u8 key,
8b237076	247	unsigned int usage, struct xdr_netobj *cksum);
de9c17eb	248
a0857d03 BF	249	u32 gss_get_mic_kerberos(struct gss_ctx , struct xdr_buf ,
a0857d03 BF	250	struct xdr_netobj *);
1da177e4	251
a0857d03 BF	252	u32 gss_verify_mic_kerberos(struct gss_ctx , struct xdr_buf ,
a0857d03 BF	253	struct xdr_netobj *);
1da177e4	254
14ae162c	255	u32
00fd6e14	256	gss_wrap_kerberos(struct gss_ctx *ctx_id, int offset,
14ae162c BF	257	struct xdr_buf outbuf, struct page *pages);
	258
	259	u32
00fd6e14	260	gss_unwrap_kerberos(struct gss_ctx *ctx_id, int offset,
14ae162c BF	261	struct xdr_buf *buf);
	262
	263
1da177e4	264	u32
3b5cf20c	265	krb5_encrypt(struct crypto_skcipher *key,
1da177e4 LT	266	void iv, void in, void *out, int length);
	267
	268	u32
3b5cf20c	269	krb5_decrypt(struct crypto_skcipher *key,
1da177e4 LT	270	void iv, void in, void *out, int length);
1da177e4 LT	271
14ae162c	272	int
3b5cf20c	273	gss_encrypt_xdr_buf(struct crypto_skcipher tfm, struct xdr_buf outbuf,
378c6697	274	int offset, struct page **pages);
14ae162c BF	275
14ae162c BF	276	int
3b5cf20c	277	gss_decrypt_xdr_buf(struct crypto_skcipher tfm, struct xdr_buf inbuf,
378c6697	278	int offset);
14ae162c	279
1da177e4	280	s32
1dbd9029	281	krb5_make_seq_num(struct krb5_ctx *kctx,
3b5cf20c	282	struct crypto_skcipher *key,
1da177e4	283	int direction,
5743d65c	284	u32 seqnum, unsigned char cksum, unsigned char buf);
1da177e4 LT	285
1da177e4 LT	286	s32
1dbd9029	287	krb5_get_seq_num(struct krb5_ctx *kctx,
1da177e4	288	unsigned char *cksum,
5743d65c	289	unsigned char buf, int direction, u32 *seqnum);
725f2865 KC	290
	291	int
	292	xdr_extend_head(struct xdr_buf *buf, unsigned int base, unsigned int shiftlen);
4891f2d0 KC	293
4891f2d0 KC	294	u32
47d84807	295	krb5_derive_key(const struct gss_krb5_enctype *gk5e,
4891f2d0 KC	296	const struct xdr_netobj *inkey,
4891f2d0 KC	297	struct xdr_netobj *outkey,
1f4c86c0 TM	298	const struct xdr_netobj *in_constant,
1f4c86c0 TM	299	gfp_t gfp_mask);
958142e9 KC	300
	301	u32
	302	gss_krb5_des3_make_key(const struct gss_krb5_enctype *gk5e,
	303	struct xdr_netobj *randombits,
	304	struct xdr_netobj *key);
934a95aa KC	305
	306	u32
	307	gss_krb5_aes_make_key(const struct gss_krb5_enctype *gk5e,
	308	struct xdr_netobj *randombits,
	309	struct xdr_netobj *key);
	310
	311	u32
	312	gss_krb5_aes_encrypt(struct krb5_ctx *kctx, u32 offset,
ec25422c	313	struct xdr_buf *buf,
934a95aa KC	314	struct page **pages);
	315
	316	u32
	317	gss_krb5_aes_decrypt(struct krb5_ctx *kctx, u32 offset,
	318	struct xdr_buf buf, u32 plainoffset,
	319	u32 *plainlen);
	320
fffdaef2 KC	321	int
fffdaef2 KC	322	krb5_rc4_setup_seq_key(struct krb5_ctx *kctx,
3b5cf20c	323	struct crypto_skcipher *cipher,
fffdaef2 KC	324	unsigned char *cksum);
	325
	326	int
	327	krb5_rc4_setup_enc_key(struct krb5_ctx *kctx,
3b5cf20c	328	struct crypto_skcipher *cipher,
fffdaef2	329	s32 seqnum);
934a95aa KC	330	void
934a95aa KC	331	gss_krb5_make_confounder(char *p, u32 conflen);